JP2007120112A - Cantilever supporting balcony in reinforced concrete-made outside heat insulating building and construction method of the cantilever supporting balcony - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To projectingly form a cantilever supporting reinforced concrete balcony from a concrete wall without impairing a composite panel in a reinforced concrete outside heat insulating building coating the outer circumference of a concrete skeleton by the composite panel equipped with air permeability and insulating. <P>SOLUTION: A Z line 1 unifying a Z upper end line 1U and a Z lower end line 1D with a Z truss line 1M equipped with an intermediate slope section 1S is penetratingly put on the composite panel 20 short in the direction of the height, the composite panel 20 is mounted and connected to the upper end of a composite panel 2 long in the direction of the height under a balcony B, and one projected from the composite panel 20 is unified by placing a concrete in the concrete skeleton CF, the other is unified by placing a concrete in a balcony floor slab SB, and an insulating layer 2B section of the composite panel 20 is rigidly structurized by the Z truss line 1M of the Z line 1 to fix in a state to unify the basic end Bb of the balcony floor slab SB with the surface of a molding cement plate 2A of the outside of the composite panel 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a cantilever slab projecting from the outer wall of the building, such as a balcony of a reinforced concrete external heat insulating building, a fence, an outer corridor, and the like, and a construction method thereof. More specifically, the present invention relates to a balcony attached to the outer wall surface of a reinforced concrete outer heat insulating building while minimizing a thermal bridge, and a construction method thereof, and belongs to the technical field of architecture.

  Reinforced concrete exterior thermal insulation buildings are coated with a thermal insulation layer on the outside of the concrete frame, so that the thermal stress on the solar concrete frame is minimal, preventing cracks in the concrete frame, and the concrete frame is not in contact with air Therefore, the neutralization of concrete can be suppressed, the corrosion of reinforcing steel bars can be prevented, the durability of the building can be improved, the temperature environment in the building can be maintained, the condensation is low, the mold and mites Since it can suppress the occurrence and is excellent in health, it is evaluated as an energy-saving high-performance building.

However, concrete floor slabs such as balconies and outer corridors that protrude from the outer wall of the building tend to become thermal bridges (heat bridges) to the concrete frame. Therefore, heat transfer to the building interior via the balcony in the external thermal environment (thermal bridges) As a thermal bridge suppression means from the balcony floor slab to the inside of the concrete frame, the applicant proposed as Japanese Patent Application No. 2002-272879 and disclosed as Japanese Patent Application Laid-Open No. 2004-108031. There is a conventional example shown in FIG.
That is, in the conventional example, as shown in FIG. 10B, an auxiliary wall is arranged at the center of the balcony tip, and the long side base end and both side ends of the balcony floor slab and the load-bearing wall of the concrete frame are supported by a group of support bars. The end of the long side of the balcony is supported by an auxiliary wall.

  As shown in FIGS. 10 (A) and 11 (A), support by each support bar group is provided with a balcony floor slab projecting on a load bearing wall covered with a composite panel composed of a cement board and a heat insulating layer. In order to break the cement panel of the composite panel due to slight deflection of the balcony floor slab, only the cement board is cut and the base end of the balcony floor slab is integrated with the heat insulating layer by placing concrete, and the support bar group is The base side is integrated with the cast concrete in the residential floor slab and the tip side in the balcony floor slab. The balcony floor slab is thermally shielded by the concrete frame, that is, the residential floor slab and the heat insulating layer. It is a thing.

In addition, as shown in FIG. 11, the support bar has a hole for insertion in the heat insulating layer of the composite panel having a height of one floor, and the composite panel is used as an outer formwork of the concrete outer wall. After forming the frame, as a work on the formwork, the disc for drilling the support rod insertion hole is bonded and fixed to the heat insulation layer insertion hole on the balcony side, and the support rod penetrates the insulation layer and the disc. The fire plate is filled in the gap between the heat insulation layer and the support rod, and the disc prevents the fire cover from protruding. On the living part side, cloth tape is attached to the heat insulation layer. Thus, the fireproof covering material is prevented from protruding.
JP 2004-108031 A

The balcony of the conventional example (FIGS. 10 and 11) is an epoch-making in which the balcony floor slab and the concrete frame (residential floor slab) are completely thermally insulated by a heat insulating layer, and the thermal bridge action is extremely reduced. Although it is a large balcony, it is necessary to dispose the support rod group on the load bearing wall from the long side base end and both ends of the balcony floor slab, and to dispose the auxiliary wall at the center of the long side. The application to the balcony floor slab of the holding slab type is inappropriate from the viewpoint of the strength due to the structure.
In addition, the arrangement of the support bar group to support the balcony floor slab is also done manually on the composite panel as a work on the mold frame after standing the composite panel with the height of the first floor standing and forming the mold. Since the fireproof coating material is manually filled in the gaps between the support bars and the composite panel heat insulating layer, the operation is complicated and difficult.

In addition, the cement panel of the composite panel is cut off at the site where the balcony floor slab abuts against the outer wall of the balcony to cope with the bending during the service life of the balcony. It is blocked by the balcony floor slab. Therefore, the ventilation structure of the outer wall of the external insulation building must be completed between the balcony floor slabs on each floor, and the top end of the balcony floor slab at each balcony floor slab part on each floor It is necessary to arrange a draining metal fitting with an air inflow hole at the section and to construct an air outflow structure at the lower end of the balcony floor slab, which is complicated.
Moreover, because the ventilation structure from the lower end to the upper end of the outer wall is cut off between balconies on each floor, wind ventilation is available, but temperature difference ventilation (draft ventilation) communicates from the lowermost end of the outer wall to the uppermost end. It was lower than the structure.
The present invention solves or improves these problems of the conventional example, and can be applied to a cantilever floor slab type while exhibiting an innovative thermal bridge blocking function similar to the conventional example. This ventilation structure also provides a balcony structure that can be constructed while maintaining a communication form from the lowermost end to the uppermost end.

  In the present invention, for example, as shown in FIG. 1, a reinforced concrete balcony floor slab SB is formed on an outer wall W of a concrete frame CF whose outer surface is thermally coated with composite panels 2 and 20 made of a molded cement board 2A and a heat insulating layer 2B. Is a balcony B that is supported in a cantilevered slab form by only a group of supporting Z-strands, and the composite panels 2 and 20 are formed on the inner surface of the molded cement board 2A through the grooves G and G 'for ventilation. It is a breathable heat insulation panel layered with the heat insulation layer 2B, and the composite panel 20 is a vertically short panel with the Z line 1 penetratingly attached. The Z line 1 is a Z upper end line 1U and The Z bottom bar 1D is fixedly integrated with a Z truss bar 1M composed of a horizontal upper side 1U ′, an intermediate inclined part 1S and a horizontal lower side 1D ′, and the balcony B penetrates the composite panel 20 and is based on it. Conclude end The surface of the molded cement plate 2A of the composite panel 20 is composed of only the Z-strand group 1 which is integrally fixed in the housing CF and the tip side is integrally fixed in the balcony floor slab SB. It is a cantilever balcony that is fixedly supported in an integrated state.

The “balcony” is a general term for a balcony, a veranda, an outer corridor, and the like that has a floor protruding from the outer wall of the building.
In this case, the composite panel (Z-strand panel) 20 is a panel that defines the base end Bb of the balcony floor slab SB. Typically, the composite panel 2 has a size approximate to the thickness of the balcony floor slab SB. The composite panel 2 that has been cut has the same cross-sectional structure, and the Z-strip 1 is disposed through a panel that is short in the height direction, and is connected to the upper end of the composite panel 2 below the balcony B. The height of the composite panel 2 + composite panel 20 is the height of one composite panel on the general outer wall.
Moreover, what is necessary is just to implement the vertical connection connection of each composite panel 2 and the composite panel 20 provided with air permeability and heat insulation with the cross joint 9 for air communication shown in FIG. 8, for example.

  Further, the Z muscle 1 that supports the balcony floor slab SB in a cantilever form is one in which the Z upper muscle 1U opposes the tensile force caused by the bending moment and the Z lower muscle 1D opposes the compressive force caused by the bending moment. The Z truss bar 1M gives the stress center distance of the bending moment between the Z upper bar 1U and the Z lower bar 1D, and the composite panel 20 existing between the residential floor slab SA and the balcony floor slab SB. Since the Z truss bar 1M provides a rigid structure within the panel width T1 (standard: 100 mm), the inclined part 1S is located on the balcony side from the upper Z bar 1U on the balcony side as in the embodiment (FIG. 2). As a form against the tensile force that skews the Z lower end 1D, or as a form against the compressive stress that the inclined part 1S skews from the Z lower end 1D on the balcony side to the Z upper end 1U on the living side, Exhibit the function of the bending moment against the over floor slab SB.

Further, the length and thickness of each of the Z upper muscle 1U, the Z lower muscle 1D, and the Z truss 1M constituting the Z muscle 1 are determined by structural calculation from the arrangement interval of the Z muscle 1, the balcony floor slab weight, and the like. The component bars 1U, 1D, and 1M of the Z bar 1 may be formed of deformed steel bars from the viewpoint of concrete adhesion resistance.
For example, as shown in FIG. 5, if a standard product (AW, standard: 480 mm) cement plate 2A is used for the composite panel 20 and the arrangement position of the Z streaks 1 is constant, a wide width a4 in the center of the cement plate 2A ( Standard: 40 mm) portion, Z spacing 1 arrangement interval (cement board width (AW 480 mm) + longitudinal joint (dy) width 10 mm = 490 mm) is determined.
Therefore, in general (when a partial load is not applied to the balcony floor slab, etc.) due to the weight of the balcony floor slab, etc., that is, the depth dimension LB of the balcony B and the required flexing performance, the Z-strip 1 is configured. The length and thickness of each Z upper bar 1U, Z lower bar 1D, and Z truss bar 1M are determined.

Since the calculation of the fixed load and the load load of the balcony B is the same in Japan, the composite panel 20 constituting the Z-strip 1 and the composite panel 2 has a depth LB (standard: 1500 mm length) of the balcony, Since the length and thickness of each of the Z upper bar 1U, Z lower bar 1D, and Z truss bar 1M constituting the Z bar 1 are appropriately adopted, the number of types of the composite panel 20 can be reduced, and it can be prepared in the factory in advance. .
Moreover, since the composite panel 20 does not contribute structurally mechanically to the Z-strip 1 in any way, the penetration form of the Z-strip 1 with respect to the composite panel 20 should be implemented in consideration of the hindrance to the ventilation function and the heat insulation function of the composite panel 20. It is only necessary to remove the position of the ventilation grooves G and G ′ of the molded cement board 2A to penetrate the Z-strip, and to insulate and repair the periphery of the Z-strip 1 after the Z-strip 1 penetrates the heat-insulating layer 2B.

Therefore, in the present invention, the Z-strip panel (composite panel) 20 for constructing the balcony floor slab SB is a small panel with a short height direction, and can be produced in advance as a single unit in advance. The preparation, storage, and supply of the homogeneous composite panel 20 with 1 can be performed rationally, complicated and difficult work on the formwork at the site can be rationalized, and the construction of a reliable balcony B is streamlined I can do it.
By appropriately selecting and implementing the Z-strip 1, the composite panel 20 existing between the residential floor slab SA and the balcony floor slab SB is given rigidity as if concrete had been arranged by the Z-truss 1M. I can do it.

  Moreover, the balcony floor slab SB includes the composite panel 2 on the outside of the outer wall W and the composite panel 20 including the Z-strips 1 both having the grooves G and G ′ for ventilation. There is no damage to the ventilation and heat insulation functions of the panel 20, and it is a form that is firmly attached in a cantilever support form, and there is no blocking of the ventilation groove G for each balcony of each floor of the composite panel as in the conventional example. This eliminates the need for individual ventilation structure construction above and below the balcony, which not only streamlines the construction, but also allows the ventilation structure to communicate from the drainage at the bottom end of the outer wall to the topmost headboard. A cantilevered slab type balcony B is reasonably implemented on the outer wall of the outer heat insulation with excellent ventilation, which provides draft ventilation (temperature difference ventilation) without impairing the ventilation performance. Done .

The balcony floor slab SB cantilevered in a state where the stress displacement of the base Bb of the balcony floor slab is substantially negligible (standard: 0.3 mm or less) because of the strong bending moment resistance of the Z muscle 1. Since the reinforced concrete balcony floor slab SB can be integrally attached to the molded cement plate 2A of the composite panel 20, the appearance is rich in functional beauty.
Therefore, the breathable composite panel 2 and the composite panel 20 are provided with a breathable outer heat insulation structure from the draining of the lower end to the headboard of the upper end, and provided with a balcony B at a suitable position outside the outer wall W, and are of high quality and appearance. This makes it possible to rationally construct reinforced concrete exterior heat insulation buildings.

Further, in the balcony of the present invention, the Z line 1 has a long hole-shaped insertion hole H3 in the vertical direction in the heat insulating layer 2B of the composite panel 20, and the Z-line insertion circle in the molded cement board 2A. It is preferable to penetrate the composite panel 2 through the holes H1, H1 ′, and H2.
In the composite panel 2 and the composite panel 20, the molded cement board 2A guarantees the strength and air permeability of the composite panels 2 and 20 themselves, and the heat insulating layer 2B covers the concrete wall W by heat insulation. Therefore, in the composite panel 20, the insertion holes H 1, H 1 ′, H 2, H 3 penetrating the Z line 1 are preferably smaller in terms of function, and the heat insulating layer 2 B is the Z truss line 1 M of the Z line 1. Therefore, the insertion hole H3 may be a long hole in the vertical direction.
Further, as shown in FIG. 5 (B), the composite panel 2 and the composite panel 20 have a thick part 2D having a wide width a4 (standard: 40 mm) at the center of the molded cement plate 2A. If the diameter of the Z bar is selected so that one Z bar 1 is arranged per sheet, the Z bar insertion holes H1, H1 ', H2 are wide and thick portions 2D at the center of the molded cement board 2A. The hole H3 for insertion of the heat insulating layer 2B is an elongated hole in the vertical direction, so that the Z-strip 1 can be easily penetrated. What is necessary is just to fill and repair insulation.

  Then, as shown in FIGS. 4 (A) and 4 (C), the insertion holes H1 and H1 ′ are arranged in the upper and lower communication form on the upper side of the molded cement plate 2A, and the insertion hole H2 is arranged on the lower side. As shown in FIG. 9 (A), the Z-strip 1 can be penetrated into the composite panel 20 from the heat insulating layer 2B side at the time of factory manufacture. The Z-upper end 1U is inserted in the insertion hole H1, and the Z truss is inserted in the insertion hole H1 '. The horizontal upper side 1U 'of the bar 1M can be inserted through the insertion hole H2 and the lower Z bar 1D. After the penetration of the Z line 1, the insertion holes H1, H1' and H2 are all inserted reinforcing bars and are substantially sealed. Therefore, at the time of filling and repairing of kao wool (Isolite Kogyo Co., Ltd., trade name), a fireproof heat insulating material for the insertion hole H3 in the shape of the long hole in the heat insulating layer 2B, and on-site urethane foam filling repair construction, molded cement plate 2A Has a mold function as a stopper and repairs the composite panel 20 after the penetration of the Z muscle 1 Work becomes easy.

Further, it is preferable that the diameters of the circular holes H1, H1 ′, H2 for inserting the Z-strip of the molded cement plate 2A are slightly larger than the maximum diameters of the insertion-stripes 1U, 1M, 1D.
In this case, the diameter of each insertion circular hole H1, H1 ', H2 may be approximately 3 mm larger than the diameter of each insertion muscle, and in-situ foamed urethane can be repaired by repairing the heat insulation function for the insertion hole H3 of the heat insulation layer 2B. If filled, inflow filling of urethane foam also occurs in the gaps between the circular holes H1, H1 ′, H2 and the insertion bars 1U, 1M, 1D, and the balcony floor slab SB has a Z line 1 at the base end Bb. The amount of displacement (the amount of deflection) is set to 0.3 mm or less, but the urethane foam filled in the gaps between the circular holes is not affected by the shaking of the molded cement plate 2A or the movement of the Z-strip 1 during an earthquake. The molded cement board 2A can function as a cushioning material, and crack damage to the molded cement board 2A can be suppressed.

In the present invention, the Z-strand 1 has an intermediate inclined portion 1S of the Z truss muscle 1M in which the Z upper muscle 1U and the Z lower muscle 1D are fixedly integrated, with respect to the Z upper and lower muscles 1U and 1D. It is preferable that the inclination is substantially 45 °.
In the present invention, due to the bending stress acting on the balcony floor slab SB, tensile stress acts on the Z upper end muscle 1U and compressive stress acts on the Z lower end muscle 1D, and the neutral axis of the interface between the bending stress and the compressive stress acts on the neutral axis. Since the generated shear stress is theoretically 45 °, the Z truss bar 1M inclined at 45 ° can effectively counter the shear stress, and the Z bar 1 can be rationally selected.

Further, it is preferable that the Z truss bar intermediate inclined portion 1S of the Z bar 1 is inclined and arranged over the entire width T3 of the heat insulating layer 2B of the composite panel 20 to give the heat insulating layer 2B a rigid structure function.
In this case, the truss structure by the Z truss bar 1M can be introduced over the entire width of the heat insulation layer width T3 (standard: 75 mm) of the composite panel 20, and the heat insulation layer 2B having a low strength per se is mechanically replaced with a concrete body. Because of the structure, the balcony floor slab SB is structurally a rigid structure in which the heat insulating layer 2B between the concrete floor W and the balcony floor slab SB is located between the Z upper bar 1U and the Z lower bar 1D by the Z truss bar 1M. Combined with the provision of a sufficient center distance of bending moment, the amount of bending due to the bending moment of the balcony floor slab base end Bb (standard: 0.3 mm or less) can be greatly reduced, and the cantilever support of the balcony floor slab SB is strong. Is possible.

Further, in the Z-strip 1, the fixing portion ZU between the Z upper end muscle 1U and the Z truss bar 1M is in the balcony floor slab SB, and the fixing portion ZD between the Z lower end bar 1D and the Z truss bar 1M is in the concrete frame CF. It is preferably integrated with the cast concrete.
In this case, as shown in FIG. 2 (B), the inclined portion 1S of the Z truss bar 1M is inclined downward from the balcony floor slab side to the residential floor slab side. The tensile force generated in the upper half of the top and bottom thickness TB of the balcony floor slab SB cooperates with the anti-tensile force of the Z upper end muscle 1U and the anti-tensile force of the Z truss muscle 1M, and the Z muscle 1 becomes the balcony floor slab SB. Can be reasonably suppressed.

Moreover, it is preferable that the Z-strand 1 is fire-resistant coated in the heat insulating layer 2B of the composite panel 20 as shown in FIG. 9B.
In this case, the fireproof covering material 2E is rich in fire resistance and heat insulation, and can be cut with scissors, for example, kao wool (Isolite Industry Co., Ltd., trade name), Fibro (Sekisui Chemical Co., Ltd., trade name), etc. The Z-strip 1 may be covered with and in-situ foamed urethane may be injected and filled.
The Z-strand 1 always bears the strength against the downward deflection of the balcony floor slab SB, but is protected by the fireproof covering material 2E at the heat-insulating layer 2B, so that the heat-insulating layer 2B burns during a fire. On the other hand, it is possible to prevent the lowering of the supporting force due to the deterioration of the heating of the Z-strip 1, to ensure the fire resistance of the balcony B and to repair the heat insulating function of the insertion hole H3 of the heat insulating layer 2B.

In addition, as shown in FIG. 9A, the Z-strip 1 is applied with a fireproof paint 1A at an intermediate portion located in the composite panel 2 and with a rust-preventive paint 1B at both sides located in the cast concrete. Is preferred.
In this case, the SK fire-resistant coat top coat (SKE Chemical Co., Ltd., trade name) may be used as the fire-resistant paint 1A, and the anti-corrosion and heat-insulating epoxy resin paint is used as the anti-rust paint 1B. (SK Kaken Co., Ltd., trade name) may be used.
Therefore, if the heat insulation function is repaired by filling the hole H3 of the heat insulation layer 2B with a fireproof coating material or in-situ foaming urethane, the fire inferiority of the Z line 1 is also lost during the combustion of the heat insulation layer 2B in the event of a fire. The bottom can be suitably prevented, the corrosion of the Z reinforcement 1 in the concrete can be suppressed, and the durability of the balcony B is improved in a highly durable external heat insulating reinforced concrete building.

  In addition, as shown in FIG. 5, the invention of the method of constructing the cantilevered balcony B has a heat insulating layer 2B on the inner surface side of the molded cement board 2A in which the grooves G and G 'for ventilation are vertically arranged on the inner surface. As shown in FIG. 6, the composite panel 2 is erected as an outer wall outer mold frame F0 with the molded cement plate 2A as an outer surface, and constitutes an outer wall mold frame FW together with the outer wall inner mold frame F1, and on the outer wall mold frame FW. A living room floor slab formwork FA is formed inside the composite panel 2 and a balcony floor slab formwork FB is formed outside the composite panel 2. 1D and a composite panel 20 having a Z-strut 1 fixedly integrated with a Z-truss 1M composed of a horizontal upper side 1U ′, an intermediate inclined part 1S and a horizontal lower-side 1D ′, and a composite panel 20 of the outer wall formwork FW 2 is mounted via a cross joint 9 for air communication. The Z bars 1 connected and projecting back and forth from the composite panel 20 are respectively arranged in the balcony floor slab formwork FB and the living part floor slab formwork FA, and are placed on the formwork FW, FA, and FB. It is to be established.

  In this case, a composite panel (Z-strip panel) 20 having a Z-strip 1 that is placed and connected on the composite panel 2 of the outer wall formwork FW is prepared in advance as a factory-produced product. If the upper part of the outer wall W is the outer wall W, that is, as shown in FIGS. 2A and 2B, the Z-stripe panel 20 is sandwiched between the upper and lower composite panels 2, the height is short. Since the composite panel 2 having a long height is fitted and placed above the Z-strip panel 20, the Z-strip panel 20 has a heat insulating layer on the upper end surface as shown in FIGS. 4 (A) and 4 (B). A type in which 2B protrudes (d1) from the molded cement board 2A (standard height Ah of the molded cement board 2A: 169 mm) is used to phase-join with the upper composite panel 2.

In addition, as shown in FIGS. 3A and 3B, when the doorway door 7 is disposed above the Z-strip panel (composite panel) 20, that is, when there is no outer wall W on the upper part of the balcony floor slab SB, As shown in FIGS. 4C and 4D, the Z-stripe panel (composite panel) 20 has a type in which the heat insulating layer 2B and the molded cement board 2A are flush with each other (standard height Bh of the molded cement board 2A). : 242 mm).
That is, in constructing the balcony B provided with the doorway door 7 and the concrete outer wall W, the Z-stripe panel 20 for phase-breakage connection shown in FIGS. 4 (A) and 4 (B) and FIGS. 4 (C) and 4 (D). Two types of Z-strand panel 20 for placing doorway door 7 are prepared.
4A and 4B and the Z-stripe panel 20 of FIGS. 4C and 4D both have the same cross-sectional shape as the composite panel 2 and have a panel width AW. The (molded cement board width) is also the same as the composite panel 2 (standard: 480 mm), and the heights Ah and Bh of the panel 20 may be determined according to the vertical connection form.

Therefore, in the present invention, after the mold frame is erected on the outer composite frame F0 of the outer wall with the long composite panel 2 as shown in FIG. 6, the short Z-stripe panel 20 as shown in FIG. Is placed on the composite panel 2 so that the composite panel (Z-stripe panel) 20 can be placed at the time of bar arrangement to the balcony B and the living part A, and the Z-stripe panel 20 as a single unit is small. Therefore, combined with the ease of handling, the workability of the formwork construction is good.
In addition, since the composite panel 20 as a factory manufactured product is simply placed on the composite panel 2 of the outer wall formwork FW at the time of formwork, the bar arrangement on the formwork in the conventional example (FIGS. 10 and 11). Work and refractory insulation filling and covering work can be dramatically streamlined.

And, each work of the formwork, reinforcement and concrete placement of the balcony floor slab SB can be carried out in parallel with the construction work on the side of the building concrete frame (concrete wall W and living section floor slab SA). It is possible to carry out the work with almost the same workability as a large balcony with a thermal bridge action from the balcony to the floor slab.
In other words, the resulting balcony is an innovative cantilevered balcony that does not form a thermal bridge in the external insulation building, but before the conventional example (FIGS. 10 and 11) was proposed, It can be constructed with the same workability as the construction of balconies in a form that creates a thermal bridge effect on the inner insulation building.

Further, since the reinforcing bar as in the conventional example (FIGS. 10 and 11) is not necessary, the reinforcing bar in the balcony floor slab SB is easy for the Z reinforcing bar 1 of the composite panel 20, and the balcony floor slab SB itself is Z. In order to provide a strong support function by the Z muscle 1 in which the upper end muscle 1U and the Z lower edge muscle 1D are integrated with the Z truss muscle 1M while maintaining a sufficient stress center distance, The supporting auxiliary walls as in the examples (FIGS. 10 and 11) are also unnecessary, and the present invention can provide the balcony B that is excellent in aesthetics and has a high degree of design freedom.
In addition, the composite panel 20 with the Z-strip 1 is a factory-produced product that penetrates the Z-strip 1 and is homogenously carried out without impairing air permeability and heat insulation by repairing the penetration part with the fireproof covering material 2E. In addition, the protruding formation of the balcony B can be performed without impairing the heat insulating function and the ventilation function between the composite panel 2 and the composite panel 20 having the same cross-sectional shape as the covering material of the outer wall W.
Therefore, as for the balcony B, as in the conventional example, it is not necessary to construct a complicated air inflow / outflow facility, which is necessary because a part of the composite panel is lost due to the protrusion of the balcony above and below the balcony. Thus, the construction can be streamlined, and the balcony B protrudes from the outer wall that performs draft ventilation from the lower end to the upper end of the building.

Further, as shown in FIG. 9A, the Z-strip 1 is preliminarily coated with a fireproof paint 1A on a portion located in the composite panel 2 and a rust preventive paint 1B on a portion located in the cast concrete. It is preferable that the composite panel 20 is formed by penetrating the composite panel 20 and filling the insertion hole H3 in the form of a long hole in the composite panel heat insulating layer 2B with the fireproof covering material 2E having a high heat insulating property.
In this case, an epoxy resin coating (ESK Kaken Co., Ltd., trade name: fireproof coating primer) excellent in corrosion resistance, adhesion, and heat insulation is applied twice over the entire length of the Z-strip 1 and Z If a fire-resistant paint (SK Co., Ltd., trade name: SK fire-resistant coat) is further applied to the portion located in the composite panel 2 at the center of the streak 1, the anti-rust paint 1B and fire-resistant to the Z-strip 1 are applied. It becomes processing of paint 1A.

In addition, the fire-resistant coating material to be filled in the insertion hole H3 is a fire block (Sekisui Chemical Co., Ltd., trade name) or kao wool (Isolite Industry Co., Ltd.) Name) may be used, and in-situ foaming urethane filling may be used.
And what is necessary is just to implement the filling construction of the fireproof covering material 2E by using the shaping | molding cement board 2A as a stopper from the residence part floor slab formwork FA side.
Therefore, since the Z-strand 1 is fire-resistant coated in the composite panel 20, even if the heat insulating layer 2B burns in a fire, it is possible to suppress the heating deterioration of the Z-strand 1 and, in concrete, anticorrosion. Because of the paint 1B rich in adhesion, adhesion and heat insulation, the heat from the concrete to the Z-strip 1 is the only thermal bridge action member from the balcony floor slab SB into the concrete frame CF due to the heat insulation of the paint 1B. Transmission can be suppressed, and the deterioration of the function of the Z-strip 1 can be suppressed by the anticorrosive property of the paint 1B, and the balcony B becomes a highly durable balcony in which the thermal bridge action can be extremely suppressed.

In addition, the Z-strip 1 is held by the spacers 12A and 12B in the balcony floor slab form FB and in the living part floor slab form FA, and in the balcony floor slab form FB, the Z upper end 1U is It is preferable that the Z lower end line 1D is bound to the long side direction upper end line 11A and the long side direction lower end line 11B with a wire.
In this case, as the spacer, the spacer 35 for the Z upper bar 1U has the type 35 of the patent spacer (Marui Sangyo Co., Ltd., trade name), and the spacer 12B for the Z lower bar 1D has the patent spacer (trade name). The model 130 may be adopted.

  Accordingly, when the composite panel 20 prepared in advance is placed and connected to the composite panel 2 of the outer wall formwork FW by the cross joint 9, even if the posture of the Z-strain 1 is slightly displaced, it enters the formwork FB and FA. It is easy to correct the posture at the time of placement, and can be secured in a position where the Z upper end bar 1U as a functionally important tensile reinforcing bar can hold the design covering thickness of the concrete with a cantilever slab. The posture of the balcony B can be maintained while maintaining the design interval with the lower end muscle 1D, and the Z muscle 1 can be integrated with the upper edge muscle 11A and the lower edge muscle 11B in the long side direction of the balcony B under an appropriate posture. Can prevent the accidental fall of balcony B during durability due to bad binding in assembly, formwork, concrete stroking of Z and tension bars and poor fixing of reinforcement. .

Further, as shown in FIG. 8 (B), the upper and lower connections between the composite panel 2 and the composite panel 20 are provided with horizontal contact plates 9M projecting on both sides, and provided with vertical pieces 9F and 9F ′ for insertion on the upper and lower sides, and The cross joint 9 having an incision CA for air communication is formed inside the vertical fitting vertical pieces 9F and 9F ′, as shown in FIGS. 2 (B) and 3 (B). It is preferable to carry out by inserting the end into the groove G and interposing a rubber plate 15 between the plate-like portions 2C of the upper and lower molded cement plates 2A.
In this case, at the contact connecting portion between the lower composite panel 2 and the upper composite panel (Z-strand panel) 20, as shown in FIGS. 2 (B) and 3 (B), the horizontal contact plate 9M is formed cement. Since the rubber plate 15 is sandwiched between the upper and lower composite panels 2 and 20 between the strip-like portion 2C on the upper end outer side of the molded cement plate 2A, between the groove G portions on the upper end inner side of the plate 2A, the rubber The plate 15 is butyl rubber having the same width as the width of the plate-like portion 2C of the molded cement plate 2A (standard: 12 mm), and the thickness is the same as the thickness of the horizontal abutting plate 9M (standard: 3 mm) or slightly. The horizontal abutment plate 9M of the cross joint 9 has a side projection length X3 from between the upper and lower grooves G that does not interfere with the ventilation grooves G 'on both sides (standard: 20 mm). Just do it.

Therefore, the lower joint of the upper composite panel 20 and the upper end of the lower composite panel 2 are connected to each other in the present invention, so that the cross joint 9 has an inner portion of the upper insertion vertical piece 9F and the lower insertion vertical piece 9F ′. With the incision CA passing through the top and bottom, even the ventilation groove G in which the cross joint 9 is inserted guarantees the vertical air flow, and the rubber plate 15 can follow the movement of the molded cement plate 2A during an earthquake.
Further, by achieving the vertical connection of the composite panel 2 with the thin thickness (standard: 3 mm) of the horizontal abutment plate 9M, it is possible to suppress the occurrence of a step portion such as a normal joint width (standard: 20 mm). As shown in FIG. 2, the treatment of the waterproof layer 3 ′ at the rising portion on the upper surface of the base end of the balcony B can be performed easily and smoothly.

The cantilever supporting balcony B of the present invention is a concrete frame with a Z-strut 1 that integrates the Z upper end 1U and the Z lower-end 1D with a Z truss 1M in a form that sufficiently maintains the stress center distance of the bending moment. Since it is cantilever-supported to the CF, it is possible to provide strong support, eliminating the need for supporting structures such as auxiliary walls and pillars on the tip side of the balcony B, and providing a balcony with a high degree of design freedom and aesthetic appeal. Can be provided.
Moreover, since the composite panel (Z-strand panel) 20 for constructing the balcony floor slab SB can be manufactured in advance as a single unit, the preparation, storage, and supply of the homogeneous composite panel 20 with the Z-strand 1 installed through it are rationally implemented. It is possible to rationalize the construction of the reliable balcony B.

  Further, the Z-strip 1 penetrates through the composite panel 20 having the breathability and heat insulation covering the outside of the outer wall W, and exhibits a high bending resistance to support the balcony B. Therefore, the balcony floor slab base end Bb is Even if the molded cement plate 2A is attached to the outer surface of the composite panel, the molded cement plate 2A is not cracked. Therefore, the composite panel 20 can be repaired only by the Z-barbed portion, and the outer wall W The balcony B can be neatly projected on the outer wall of the reinforced concrete exterior insulation building without damaging the ventilation function and the insulation function.

  Also, in the construction of a cantilever supporting balcony, the arrangement of the composite panel (Z-strand panel) 20 with the Z-strip 1 can be performed at the time of bar arrangement to the balcony floor slab SB and the living section floor slab SA. SB formwork, reinforcement, and concrete placement work can be carried out in parallel with building concrete frame construction work. Conventionally, with internal insulation, residential floor slabs and balcony floor slabs are continuously integrated. It can be constructed with almost the same workability as a reinforced concrete balcony with a large thermal bridge effect from the balcony to the floor slab.

In addition, the Z-strand panel 20 that has been subjected to the installation of the Z-strip 1 and the refractory filler filling and repairing around the Z-strip uniformly by factory production is formed on the composite panel 2 of the outer wall formwork FW at the time of formwork. Since the placement work of the Z muscle 1 in the mold is completed simply by mounting and connecting with the new cross joint 9 for air communication, the insertion work of the Z muscle 1 on the formwork having a poor work environment, the Z muscle 1 Troublesome and difficult work such as filling the surroundings with fireproof coating material can be rationalized.
In addition, the application of the Z bar 1 that sufficiently maintains the stress center distance of the bending moment eliminates the need for the supporting bar auxiliary bar as in the conventional example (FIG. 11), and facilitates the bar arrangement work on the balcony floor slab SB. Become.

In other words, the use of the Z-stripe panel (composite panel) 20 having a short height in the height direction for constructing the concrete floor slab SB has the following effects.
1. Since the attachment of the Z-strip 1 and the repair of the insertion hole H3 of the heat insulating layer 2B are performed in the factory in advance, the work at the site is saved.
2. Since the cement plate 2A of the Z-strand panel 20 is small and light, manufacturing work (layering of the heat insulating layer 2B, drilling of the insertion circular holes H1, H1 ', and H2) is easy.
3. If the depth length LB of the balcony B is 1500 mm or less, the fixed load (weight of concrete, waterproof layer, handrail: 492 kg / m ² ), load capacity (weight of building standards for people and equipment: 180 kg / m ² ) Is the same in Japan (the balcony has a bowl shape protruding from the outer wall, so the snow load is ignored), so the diameter and length of the deformed steel bar forming the Z-bar 1 are the same, and the standard product is supplied for the nationwide supply. Can be produced and ready for inventory.
Moreover, even if the depth length LB of the balcony B is more than 1500 mm, the corresponding Z-stripe panel can be easily manufactured if the diameter and length of the Z-strip 1 are calculated in advance.

4). In the conventional example (FIGS. 10 and 11), the layout position of the panel changes from the aesthetic point of view due to the change in the shape of the balcony (depth length L3 and width L1) and the change in the position of the entrance door. In addition, since the position of the support bar is designated as a dimension, it is difficult to determine in which position of the width AW of the cement plate 2A the support bar is disposed. Therefore, when the support bar is disposed in the groove G portion, The problem of closing the ventilation layer arises.
Further, from the above, the position of the support bar is located on site, and the hole for insertion of the support bar is drilled and the heat insulating layer 2B is notched, so that there is a problem in workability of mounting the support bar.
However, in the present invention, since the Z-stripes 1 are arranged in principle in the central thick part 2D of the cement board 2A, it is possible to cope with the difference in the mounting position and the arrangement of the filling area 2E.

[Balcon shape (Fig. 1)]
FIG. 1 is a perspective explanatory view of a balcony. As shown in FIG. 1, a balcony B has a thickness T1 as an outer surface of a concrete outer wall W having a wall thickness TW of 180 mm as a load-bearing wall of a concrete frame CF. A 100 mm composite panel 2 and a composite panel (Z-strand panel) 20 are covered and stretched in a vertically connected form, and are projected in a cantilevered manner from the outer surface of the Z-stripe panel 20, and the balcony floor slab SB is made of concrete. It is supported only by the Z muscle 1 extending through the Z muscle panel 20 from the housing floor slab SA on the housing CF side, and the Z muscle 1 is arranged at the center in the left-right width direction of the Z muscle panel (composite panel) 20. In addition, one Z-strand panel 20 is disposed per sheet.
The balcony B has a depth LB of 1500 mm, a thickness TB of 180 mm, and a parapet P having a height T7 of 50 mm and a width T6 of 150 mm is erected on the top edge of the long side. Arranges a conventional angle headboard 5 and forms a handrail 6 via a handrail column 6B erected on the bottom plate 6A. The waterproof layer 3 is provided on the surface (upper surface) Sf of the balcony B, and the base end Bb from the balcony base end Bb. A waterproof layer 3 ′ is stretched up to the waist drainer 4 at the rising portion.

[Composite panel 2 (Fig. 5)]
As shown in FIG. 1, the composite panel 2 is vertically connected to the Z-strip panel 20 to cover the outer surface of the concrete outer wall W. The Z-strip panel 20 is the base of the balcony floor slab SB, and the composite panel 2 is the Z-panel. This is a panel that covers the lower and upper portions of the muscle panel 20.
As shown in FIG. 5B, the composite panel 2 includes a molded cement board 2A having a thickness T2 of 25 mm and a width Aw of 480 mm, and a foamed plastic insulating layer (JIS9511) having a thickness T3 of 75 mm and a width Bw of 490 mm. A panel having a thickness T1 of 100 mm and a standard size of a molded cement plate 2A having a width Aw of 480 mm and a height 2h of 2485 mm.
That is, the composite panel 2 has a composite panel 20 (standard height: 195 mm), which will be described later, placed on the upper part and connected to the upper part, and the height of one composite panel used for the general outer wall part (outer wall part where the balcony B does not exist). (Standard: 2680 mm).

As shown in FIG. 5B, the molded cement board 2A has a thick part 2D having a wide width a3 (45 mm) on both sides and a thick part 2D having a wide width a4 (40 mm) on the both sides, and is formed on the inner surface of the molded cement board. Is provided with 13 mm (T5) depth grooves G and G ′, and the groove G on both ends and the groove G on both sides of the central thick part 2D connect the composite panel 2 up and down. In order to insert the cruciform joints 8 and 9, as shown in FIG. 5 (C), a cross-sectional trapezoid with an opening width a1 inclined at 60 ° on both side edges of 32.2 mm and a bottom width GB of 42.8 mm. is there.
Further, since the composite panel 2 is connected in parallel and used as an outer formwork of wall concrete, a countersunk bolt insertion hole that is fixed to the wall concrete (bearing wall W) with the separator insertion hole hs for the wall form frame in the center. hb is provided at both ends.

  Further, the layered form of the molded cement board 2A and the heat insulating layer 2B is, as shown in FIG. 5B, in the left-right direction, a vertical joint dy (see FIG. 10) between the panels 2 by connecting the composite panels 2 to the left and right. 5 (D)) can be formed, the heat insulating layer 2B enters 10 mm (d1 ′) on one side and protrudes 20 mm (d2 ′) on the other side with respect to the molded cement board 2A. As shown in FIG. 2A, the heat insulating layer 2B is flush with the molded cement board 2A at the upper end and protrudes by 20 mm (d1) at the lower end. As shown in FIG. Chip connection is possible.

[Composite panel 20 (FIG. 4)]
The composite panel (Z-strip panel) 20 is a panel in which the Z-strip 1 for supporting the balcony floor slab SB is penetrated, and as shown in FIGS. As shown in FIGS. 3 (A) and 3 (B), a sandwiching type that is sandwiched between the composite panel 2 and a mounting type that is connected to the lower composite panel 2 and that has an entrance door 7 disposed above. There is.
4A is an overall perspective view of the sandwich type, FIG. 4B is a BB longitudinal sectional view of FIG. 4A, and FIG. 4C is a placement type. FIG. 4D is an overall perspective view, and FIG. 4D is a DD longitudinal sectional view of FIG.
Since both the sandwiching type of FIGS. 4A and 4B and the mounting type of FIGS. 4C and 4D use the composite panel 2 connected to the lower end, The cross-sectional structure and the panel width are the same, and the sandwich type composite panel 20 and the placement type composite panel 20 have the same arrangement structure of the Z streaks 1 and have vertical dimensions and upper ends in terms of usage. Only the shape is different.
In addition, since the composite panel 20 is sandwiched between the living room floor slab SA and the balcony floor slab SB, the separator insertion hole hs and the countersunk bolt insertion hole hb are unnecessary.

That is, in the sandwich type composite panel 20, as shown in FIGS. 4A and 4B, the height Ah of the molded cement plate 2A is 169 mm, and the heat insulating layer 2B protrudes d5 (3 mm) at the lower end. At the upper end, the heat insulating layer 2B protrudes by db (23 mm), and the step d5 (3 mm) at the lower end provides a space for the horizontal contact plate 9M (FIG. 8) of the cross joint 9 used for connection with the composite panel 2. The step db (23 mm) is aligned with the phase difference step d1 when the upper composite panel 2 and the cross joint 9 are connected, that is, the step d1 at the lower end of the composite panel 2 as shown in FIG. is there.
In addition, as shown in FIGS. 4C and 4D, the mounting type composite panel 20 has a height Bh of the molded cement plate 2A of 242 mm, and the heat insulating layer 2B protrudes d5 (3 mm) at the lower end, and the upper end. Then, the heat insulating layer 2B and the molded cement plate 2A are flush with each other, the step d5 (3 mm) at the lower end provides a space for the horizontal abutment plate 9M of the cross joint 9, and the flush shape at the upper end is shown in FIG. As shown in (A), it is a form that enables smooth arrangement of the drainer 7A of the entrance door 7.

And in the composite panel 20 located in the site | part which mounts Z-strand 1 through and supports a balcony floor slab SB, ie, the composite panel 20 of FIG. 4 (A) and FIG. 4 (C), FIG. As shown in FIGS. 9A and 9B, an upper and lower upper portion as shown in FIG. 9A is formed in a wide thickness portion 2D having a thickness T2 (25 mm) and a width a4 (40 mm) at the center of the molded cement plate 2A. The circular holes H1 and H1 ′ in the form of connection and the lower circular hole H2 are configured such that the lower end of the Z upper end bar 1U insertion circular hole H1 and the upper end of the Z lower end bar 1D insertion circular hole H2 maintain an interval L14. A space L14 (70 mm) is used as an intervening region of the Z truss muscle 1M.
The circular hole H1 and the circular hole H2 have a hole diameter of 27 mm, the hole diameter of H1 ′ is 20 mm, the circular holes H1 and H1 ′ of the connection form, the Z upper end bar 1U of the 22 mm diameter deformed steel bar, and the 16 mm diameter deformed steel bar. It is possible to insert a weld fixing portion ZU (FIG. 9 (B)) with the horizontal upper side portion 1U ′ of the Z truss bar 1M, and through the circular hole H2, the Z lower end bar 1D having a deformed steel bar diameter of 22 mm can be inserted.
Then, in the heat insulating layer 2B of the composite panel 20, as shown in FIG. 9A, a Z-strand 1 insertion hole H3 in the form of a vertically elongated hole extending over the circular holes H1, H1 ′, H2 has a width of 40 mm and a height. It is drilled as a 135mm short hole, allowing insertion of Z muscle 1.

  FIG. 9A is a production explanatory view of the sandwich-type composite panel 20 of FIG. 4A. The composite panel 20 has upper connecting circular holes H1, H1 ′ and a lower circular hole H2. Then, the molded cement plate 2A having a height Ah of 169 mm and a heat insulation layer 2B having a height of 195 mm in which a hole H3 having a vertical hole having a width of 45 mm and a height of 135 mm extending over each circular hole is formed. Adhesive is applied to the thick portion 2D between the inner grooves G and G ′, and the heat insulating layer 2B protrudes from the molded cement plate 2A by db (23 mm) at the upper end and by d5 (3 mm) at the lower end. The layer stack is integrated into the form using a press.

Next, as shown in FIG. 9 (A), the Z bar 1 is inserted from the heat insulating layer 2B side, the Z upper bar 1U is in the circular hole H1, the Z truss bar horizontal upper side 1U 'is in the circular hole H1', The Z-strip 1 is mounted on the composite panel 20 so that the lower-end strip 1D has a circular hole H2 and the heat-insulating layer 2B is in the middle and protrudes on both sides. A urethane foam agent is filled and foamed during curing, and the composite panel 20 with the Z-strand 1 penetrated is obtained.
In this case, prior to filling with the urethane foam agent, a fire-resistant coating material such as kao wool (trade name) may be applied to the Z-strand 1 in the heat insulating layer.
The mounting type composite panel 20 shown in FIG. 4C may be manufactured by the same means as the composite panel 20 shown in FIG.

[Cross joint (Fig. 8 (A), (B)]
The cruciform joint has been conventionally used as a member for connecting the upper and lower sides of the outer wall panel, but the conventional one only connects the panels up and down through the insertion holes at the upper and lower ends of the panel. Even if the panel is equipped with a ventilation groove, if the upper and lower panels are connected with a conventional cross joint through the ventilation groove, the ventilation groove is closed by the cross joint and the ventilation function is lost. Was.
The A cross joint 8 and the B cross joint 9 shown in FIGS. 8A and 8B are devised in the development process of the present invention, and the vertical connection between the composite panel 2 and the composite panel 20 of the present invention. If employed, the air permeability of the groove G of the composite panels 2 and 20 is guaranteed.
That is, the A cross joint 8 in FIG. 8 (A) is used for the vertical connection of the general wall composite panel 2 without the balcony B having air permeability and heat insulation, and FIG. 4 (A) and 4 (C), it is used for vertical connection of the composite panel 20 and the composite panel 2 with the Z-strip 1 penetratingly attached.

The A cross joint 8 is a plastic molded product having a general thickness of 3 mm, and as shown in FIG. 8 (A), is a horizontal abutment made of a side plate 8S and a bottom plate B8 that protrudes from the middle to both sides and forms a horizontal joint. Part 8M, an upper vertical piece 8F for fitting into the groove G of the upper panel 2 comprising each side plate 8S and bottom plate B8, and a lower vertical piece 8F 'for fitting into the groove G of the lower panel 2; It is a cross-shaped box projecting vertically from the horizontal abutting portion 8M, and the overall vertical dimension Y1 across the entire vertical vertical pieces 8F, 8F ′ is 100 mm, and the length X1 between both ends of the horizontal abutting portion 8M is 75 mm. The box-shaped depth (depth) Z1 is 11.8 mm, the height (vertical width) Y2 of the horizontal contact portion 8M is 20 mm, the protruding length X3 on both sides is 20 mm, and the height Y3 of the upper vertical piece 8F is 50 mm, and the height Y4 of the lower vertical piece 8F ′ is 30 mm.
The upper and lower vertical pieces 8F and 8F 'inserted into the ventilation groove G of the molded cement plate 2A have a cross-sectional shape from the open side edge of the side plate 8S that contacts the bottom surface of the groove G of the molded cement plate 2A. 8S is a trapezoid which inclines to the baseplate B8 with the inclination | tilt angle matched with 60 degrees of expansion angles of the groove | channel G. FIG.

Further, the side plates 8S of the vertical vertical pieces 8F, 8F ′ are provided with a taper 8S ′ for smooth insertion at the upper and lower ends, and the tip portions of the vertical vertical pieces 8F, 8F ′ are provided between the side plates 8S. The notch 8C is opened to form an incision CA for passing the air flow up and down, and the partition pieces 8P for reinforcing the base ends of the horizontal abutting portions 8M are provided on the side plates of the vertical vertical pieces 8F and 8F ′. It is arranged between 8S.
The cross-sectional dimensions of the vertical vertical pieces 8F and 8F 'are 37.6 mm between the open edges on both sides of the side plate 8S, and the width on the bottom plate B8 side is 28 mm. The groove G on both sides of the portion 2D is dimensionally provided so as to be fitted under the width (lateral) direction adjustment of the composite panel 2.

Further, the B cross joint 9 shown in FIG. 8 (B) is used for vertical connection between the composite panel 2 and the composite panel 20 in the balcony B section. In the balcony section B, the upper and lower composite panels 2 and 20 are In order to connect in a form that does not form a horizontal joint, the B cross joint 9 has a horizontal abutment portion 8M having a vertical joint thickness (vertical height) Y2 of 20 mm for forming the horizontal joint of the A cross joint 8 and a thickness of 3 mm. The horizontal contact plate 9M is changed.
That is, the B cross joint 9 has a cross shape in which a contact plate 9M is projected on both sides by X3 (20 mm) on a box-shaped body composed of a bottom plate B9 and both side plates 9S, and the upper and lower ends are cut between the side plates 9S. An incision CA is formed at the notch 9C for allowing the air flow to flow therethrough.
The B cross joint 9 has a total height Y5 of 83 mm, that is, an upper vertical piece 9F having a height Y3 of 50 mm, a lower vertical piece 9F ′ having a height Y4 of 30 mm, and a thickness Y2 of 3 mm. It is smaller than the cross joint 8.

[Z muscle (Fig. 9)]
As shown in FIG. 9A, the Z line 1 includes a Z upper line 1U for tensile stress load and a Z lower line 1D for load of compressive stress, a horizontal upper side 1U ′, an intermediate inclined part 1S, and a horizontal lower side. It is integrated with a bent Z truss 1M provided with a portion 1D ′.
The Z-strip 1 is a member that supports the concrete balcony floor slab SB of the cantilever support type, and the resistance against the bending stress (compressive stress, tensile stress) caused by the fixed load + loading load borne by the balcony B is from the balcony B. The bending moment M is expressed by M = at × ft × j, which is determined by the diameter and interval of the steel bars fixed on the residential floor slab SA.
Here, at is the cross-sectional area of the tensile reinforcement, ft is the allowable tensile stress of the reinforcing bar, and j is the stress center distance of the bending material.
Even if the same reinforcing bar is adopted, it is important to maintain the stress center distance of the reinforcing bar, so in the present invention, as shown in FIGS. 1U and the Z lower bar 1D are welded and fixed with a Z truss bar 1M composed of a horizontal upper side 1U ′, an intermediate inclined part 1S and a horizontal lower side 1D ′, and the stress of the bending material (Z upper bar 1U + Z lower bar 1D) A center distance L15 (distance between the axial centers of the Z upper end muscle 1U and the Z lower end muscle 1D) is secured.

Further, the diameter and length of the reinforcing bar may be determined from the economical efficiency and performance (displacement 1/400 or less) for the balcony floor slab SB to be applied. For example, the depth LB in FIG. 1 is 1500 mm and the thickness TB is 180 mm. In the case of one reinforced concrete balcony B with one Z bar arranged at an interval of 490mm (one for each composite panel 2), the Z upper bar 1U and the Z lower bar 1D are rebars with a diameter of 25mm compared to the 22mm bar diameter. Is used, the fixing length can be reduced by 50 mm for the Z upper bar 1U and 30 mm for the Z lower bar 1D, but the weight increases by 1.5 kg and the material cost increases.
Of course, the steel bar with a diameter of 25 mm has a margin of 64% in strength (the diameter of 22 mm is 55%), and the displacement of the base end of the balcony B is 0.3 mm, which is the same as the diameter of 22 mm. Is 2.1 mm (diameter 22 mm is 2.7 mm) and displacement is 1/580 (diameter 22 mm is 1/450), improving strength and displacement performance.
The following is a comparison of trial calculations of the case where the steel bars used have a diameter of 19 mm, a diameter of 22 mm, and a diameter of 25 mm and are applied to the balcony B in FIG.

Diameter 19mm Diameter 22mm Diameter 25mm
Overall length (mm) of Z upper end muscle 1U 1300 1200 1150
Total length (mm) of Z lower end muscle 1D 820 760 730
Weight (kg / location) 4.8 6.0 7.5
Application price (yen / location) 305 381 477
Strength margin 38% 54% 64%
Displacement of balcony tip (mm) 3.7 2.7 2.1
Residential floor slab SA and heat insulation layer 2B
Displacement amount of the contact part with (mm) 0.3 0.3 0.2
Displacement 1/348 1/458 1/580
The Z truss bars 1M are all formed of a deformed steel bar having a diameter of 16 mm in the same form.

Further, in the Z truss bar 1M, the intermediate inclined portion 1S gives rigidity over the entire width T3 (75 mm) of the heat insulating layer 2B of the composite panel 20 as shown in FIG. 9B. Is provided with a rigidity function equivalent to that of the cast concrete, and the tensile stress of the Z upper muscle 1U caused by the bending moment of the balcony floor slab SB is borne, and the stress center is between the Z upper muscle 1U and the Z lower muscle 1D. The distance L15 is given.
Therefore, the Z-strip 1 of the embodiment of the present invention (FIG. 1) is arranged with one composite panel in the floor slab SB having a depth LB of 1500 mm and a floor slab SB having a thickness TB of 180 mm. In order to arrange them at 490 mm intervals, as shown in FIG. 9 (A), the Z upper end bar 1U has a length L10 of 1200 mm and a diameter of 22 mm, and the Z lower end bar 1D has a length L12 of 760 mm. A deformed steel bar having a diameter of 22 mm is used as a Z truss bar 1M, a deformed steel bar having a diameter of 16 mm, the intermediate inclined portion 1S is inclined at 45 °, the Z-shaped height L14 is 70 mm, the horizontal upper side 1U ′ and the horizontal lower side 1D. Using the one with '80 mm, the horizontal upper side 1U 'is in contact with the lower surface of the Z upper bar 1U and welded from both sides to the middle part in the longitudinal direction of the Z upper bar 1U and the Z lower bar 1D. ZU, and the horizontal lower side 1D 'is applied to the upper surface of the Z bottom bar 1D. And by welding from both sides and fixed part ZD and is obtained by the stress center distance L15 between the Z upper muscle 1U and Z lower muscle 1D and 92 mm.
Then, as shown in FIG. 9 (A), the epoxy resin paint (ESK Kaken Co., Ltd., trade name: fireproof coat undercoat material) excellent in anticorrosion, adhesion, and heat insulation over the entire length of the Z-strip 1 is rust-prevented. The paint 1B is applied twice, and the fire-resistant paint 1A (Ska Chemical Co., Ltd., trade name: SK fire-resistant coat) is further applied to the portion located in the composite panel 2.

[Formation of balcony housing (Figs. 6 and 7)]
FIG. 6 shows a state in which the outer wall formwork FW for the load bearing wall, the living part floor slab form FA, and the balcony floor slab form FB are constructed on the solidified balcony floor slab SB and living part floor slab SA. That is, FIG. 7 is a longitudinal sectional view of a state before the composite panel (Z-strand panel) 20 is arranged, and FIG. 7 is a longitudinal sectional view of the state in which the composite panel 20 is arranged.
The outer wall formwork FW is defined by separating a composite panel 2 that is also used as an outer formwork and an inner formwork board (formwork plywood 10A) with a conventional separator 10H, and a wide end (pipe) 10F and a rib washer 10K. Tighten with.
In addition, the occupant floor slab formwork FA and the balcony floor slab formwork FB support the template plywood 10A ′ via the large-pipe pipe 10C and the joist pipe 10B with a conventional pipe support 10D.

  The standing of the composite panel 2 as the outer wall formwork FW is the same configuration as the composite panel 2 in the general outer wall portion where the balcony B does not exist, and the height is the height of the composite panel 2 + the height of the composite panel 20. 5 (A) (not shown) is vertically connected by the A cross joint 8 for air communication, and in the portion where the balcony B exists, that is, in the illustrated portion of FIGS. 6 and 7, the composite panel shown in FIG. 2 is erected as the outer formwork F0, and the heat insulating layer 2B of each panel 2 is in close contact with the left and right sides, and the upper end protrudes d20 (5 mm) from the lower mold plate 10A ′ of the balcony floor slab formwork FB. As shown in FIG. 6, the outer wall mold FW is constructed together with the conventional inner mold F1.

In this case, when the concrete outer wall W is arranged above the balcony B, the sandwiched Z-strand panel 20 of FIG. 4A is placed on the upper end of the composite panel 2 in the assembled state of FIG. 9 is placed and connected, and the entrance door 7 is arranged above the balcony B, the Z-stripe panel of the placement type of FIG. 4C is placed on the upper end of the composite panel 2 in the assembled state of FIG. 20 are placed and connected using the B cross joint 9.
In this case, the vertical connection between the lower composite panel 2 and the Z-stripe panel 20 is performed by using the B cross joint 9 shown in FIG. It may be carried out with a total of two grooves G, and may be carried out at a total of four places using the grooves G on both sides of the central thick part 2D as necessary.
In this case, a butyl rubber plate 15 (standard: 5 mm thick) slightly thicker than the sandwiching plate 9M (3 mm thick) of the B cross joint 9 is used when the composite panel 2 and the Z-strand panel 20 are connected vertically at the B cross joint 9. It arrange | positions so that it may interpose in the plate-shaped part 2C of 2A of shaping | molding cement boards, and the impact force by the earthquake etc. between the shaping | molding cement board 2A end surfaces may be relieved.

  And in the living part floor slab formwork FA and the balcony floor slab formwork FB, the long side direction lower end muscle 11B, the short side direction lower end line 11D, the short side direction upper end line 11C, and the long side direction upper end line 11A are provided. Reinforcement binding by conventional means, and the protruding portions to both sides of the Z-strip 1 penetratingly attached to the center of each composite panel 20 in the living room floor slab mold FA and the balcony floor slab mold FB The Z-stripes 1 are supported by spacers 12A and 12B, and the upper and lower-end strips 11A and 11B in the direction of the long sides orthogonal to each other are bound with wires in the mold FB, as shown in FIG. As described above, the outer wall outer formwork F0 is connected to the composite panel 20 with the Z-stripes 1 attached to the upper end of the lower composite panel 2, and the balcony floor slab formwork FB is located at the front of the composite panel 20. Is the state where the living part floor slab formwork FA is formed

  Next, if concrete is placed in the outer wall formwork FW, the living part floor slab formwork FA and the balcony floor slab formwork FB, and the concrete form is disassembled after the concrete is solidified, the concrete outer wall W is in the balcony B part. Is integrally covered with the lower composite panel 2 and the upper composite panel 20, and a balcony floor slab SB is projected outside the composite panel 20, and the general wall is integrally covered only with the composite panel, and As for the concrete outer wall W, a building whose entire surface is covered with the composite panels 2 and 20 having air permeability and heat insulation can be obtained.

[Finishing of the balcony (Fig. 1)]
As shown in FIG. 1, a conventional synthetic polymer roofing is placed on the floor slab concrete surface Sf of the constructed balcony B, and the waterproof sheet 3 for walking is stretched, and the rising waterproof layer is also provided at the rising part of the balcony. 3 ′ is stretched upright, and a conventional waist drainer 4 (Taisei Shoko Co., Ltd., product number TA-206) having the same role as Kasagi is placed.
In this case, since the upper and lower connecting portions of the lower composite panel 2 and the upper composite panel 20 have a joint width of 3 mm (thickness of the horizontal abutment plate 9M of the B cross joint), The layer 3 'can be adhered cleanly without any trouble.
Further, a parapet P having a width T6 of 150 mm and a height T7 of 50 mm is also formed by a conventional means, and an angle headboard 5 is erected on the top of the front end, and a handrail column 6B is erected on the bottom plate 6A to form the handrail 6. To do.

  As shown in FIG. 3A, below the aluminum entrance door 7, the concrete surface Wf of the concrete wall W is previously d4 '(50 mm) above the surface Sf' of the occupant floor slab SA. The waterproof layer 3 ′ is formed up to the bottom end of the drainage 7A of the aluminum doorway 7 that is formed and positioned d4 (60 mm) above the surface Sf of the balcony floor slab SB, and the joint between the waterproof layer 3 ′ and the drainage 7A If the ceiling is sealed, the lower end of the drainer 7A is located above the upper end of the parapet P having a height T7 (FIG. 1). Therefore, even if the drainage is clogged and the rainwater overflows, There is no influence, and the groove G opened at the upper end of the lower composite panel 2 can be exhausted without any trouble from the air discharge hole formed in the drainer 7A of the doorway door 7.

Therefore, the balcony B of the present invention can be attached without impairing the ventilation function and the heat insulation function of the composite panel 2 and the composite panel 20 having air permeability and heat insulation. Since B is implemented in a cantilevered form, the thermal bridge from the balcony B to the concrete frame CF is also open air → concrete of the balcony floor slab SB → Z-strand coated with the heat-insulating rust-preventive paint 1B → concrete of the residential floor slab SA → Only the route of indoor air is achieved, and Z-strand 1 can be achieved with one composite panel, that is, with a 490 mm spacing, so that the thermal bridge action is dramatically suppressed even though it is a reinforced concrete cantilever support type. It will be done.
Moreover, both the general wall part and the wall part with the balcony B are vertically connected by the new A cross joint 8 and B cross joint 9 which do not impair the air permeability. It is possible to provide a high-quality breathable outer heat-insulated reinforced concrete building in which the bridge action can be remarkably suppressed and the outer wall has uniform breathability and heat insulation properties.

It is a vertical perspective view of this invention balcony. It is explanatory drawing of this invention balcony, Comprising: (A) is a longitudinal cross-sectional view, (B) is the elements on larger scale of (A). It is explanatory drawing of the doorway part of this invention balcony, (A) is a longitudinal cross-sectional view, (B) is the elements on larger scale of (A). It is explanatory drawing of the composite panel 20 used for this invention, Comprising: (A) is a perspective view of the composite panel 20 used for FIG. 2, (B) is the BB sectional expanded view of FIG. 4 (A), (C ) Is a perspective view of the composite panel 20 used in FIG. 3, and FIG. 4D is an enlarged cross-sectional view taken along the line DD in FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the composite panel used for this invention, Comprising: (A) is a perspective view of the composite panel 2 stuck by the balcony downward direction, (B) is a cross-sectional view of the composite panels 2 and 20, (C) is FIG. 5B is a partially enlarged view of FIG. 5B, and FIG. It is a longitudinal cross-sectional view in the middle of the formwork construction of the present invention. It is a longitudinal cross-sectional view of the completed formwork construction of the present invention. It is a perspective view of the cross joint used for this invention, Comprising: (A) is a figure which shows A cross joint for general wall parts, (B) is a B cross joint for balcony parts. It is explanatory drawing of the composite panel 20 of this invention, Comprising: (A) is an exploded view, (B) is a principal part enlarged view. It is a prior art figure, (A) is a perspective view, (B) is a top view. 11A and 11B are explanatory views of a main part of the conventional example in FIG. 10, where FIG. 11A is a longitudinal sectional view, FIG. 11B is a view as viewed from an arrow B in FIG. 11A, and FIG. FIG.

Explanation of symbols

1 Z line 1A Fireproof paint 1B Rust prevention paint 1D Z bottom line (insertion line)
1D 'Horizontal lower side 1M Z truss muscle (insertion muscle)
1S Middle slope (slope)
1U Z upper edge muscle (insertion muscle)
1U 'Horizontal upper part 2 Composite panel (panel)
2A Molded cement board (cement board)
2B Heat insulation layer 2C Plate-like part 2D Thick part 2E Fireproof coating material (filler)
3, 3 'Waterproof layer 4 Waist drainer 5 Angle coping 6 Handrail 6A Bottom plate 6B Post (handrail post)
7 Aluminum doorway (entrance door, doorway)
7A Drainer 7B Rainer 8 A Cross joint (cross joint)
9 B cross joint (cross joint)
8C, 9C Notch 8F, 9F Upper vertical piece (vertical piece for insertion)
8F ', 9F' Lower vertical piece (vertical piece for insertion)
8M horizontal contact part (clipping piece)
9M horizontal contact plate (contact plate, sandwich plate)
8S, 9S Side plate 8S ', 9S' Taper

10A, 10A 'template (plywood)
10B joist (pipe)
10C large pull (pipe)
10D Pipe support 10E Thick vertical end (pipe)
10F Side end thick (pipe)
10G, 10g Pier 11 Floor slab reinforcement 11A Long side upper edge (upper edge)
11B Long side direction lower edge (lower edge)
11C Short edge upper edge (upper edge)
11D Lower edge in the short side direction (lower edge)
11E Wall vertical stripe 11F Wall horizontal stripe 12A, 12B Spacer 14 Tile 15 Rubber plate (Butyl rubber plate)
20 Z-stripe panel (composite panel, panel)
A living part
B Balcony Bb Base end B8, B9 Bottom plate CA Incision part CF Concrete frame dy Longitudinal joint F0 Outer wall outer formwork F1 Outer wall inner formwork FA Living part floor slab formwork (formwork)
FB Balcony floor slab formwork (formwork)
FW outer wall formwork (formwork)
G, G 'Ventilation groove (strip)
hb Countersunk bolt insertion hole hs Separator insertion hole H1, H1 ', H2 Insertion circular hole (insertion hole, circular hole)
H3 insertion hole P Parapet SA Residential floor slab (floor slab)
SB balcony floor slab (floor slab)
Sf, Sf 'Floor slab surface W Exterior wall (concrete wall, concrete exterior wall)
ZD, ZU fixed part

Claims (12)

  A reinforced concrete balcony floor slab (SB) is attached to the outer wall (W) of a concrete frame (CF) whose outer surface is thermally coated with a composite panel (2, 20) composed of a molded cement board (2A) and a heat insulating layer (2B). ) Protruding and supported in a cantilever slab form only by the supporting Z-strip (1) group, and the composite panel (2, 20) is formed on the inner surface of the molded cement board (2A). It is a breathable heat insulation panel having a groove (G, G ') group for ventilation and layered with the heat insulation layer (2B), and the composite panel (20) is an upper and lower side through which the Z-strip (1) is attached. It is a directional short panel, and the Z line (1) is composed of a Z upper end line (1U) and a Z lower end line (1D), a horizontal upper side part (1U '), an intermediate inclined part (1S), and a horizontal lower side part (1D). ′) Z truss bars (1M) made of The knee (B) penetrates through the composite panel (20), the base end side is integrally fixed in the concrete frame (CF), and the distal end side is integrally fixed in the balcony floor slab (SB) (1 ) In a reinforced concrete exterior heat insulating building which is fixedly supported by the group alone and the base end (Bb) of the balcony floor slab (SB) is integrated with the surface of the molded cement board (2A) of the composite panel (20). Cantilevered balcony.   In the heat insulating layer (2B) of the composite panel (20), the Z line (1) is an insertion hole (H3) in the form of a long hole in the vertical direction, and the formed cement board (2A) is a circular hole for Z line insertion. 2. Balcony according to claim 1, which penetrates the composite panel (20) via (H1, H1 ', H2).   The balcony according to claim 2, wherein the diameter of each circular hole (H1, H1 ', H2) for inserting the Z-strip of the molded cement board (2A) is slightly larger than the maximum diameter of each of the penetrations (1U, 1M, 1D). .   The Z-strip (1) has an intermediate slope (1S) of the Z truss bar (1M) in which the Z upper-end bar (1U) and the Z-bottom bar (1D) are fixed and integrated, and the Z upper-bottom bar (1U, 1D). The balcony of claim 1, 2 or 3, which is substantially inclined at 45 °.   The Z truss bar intermediate inclined portion (1S) of the Z bar (1) is disposed to be inclined over the entire width (T3) of the heat insulating layer (2B) of the composite panel (20), and a rigid structure is formed on the heat insulating layer (2B). The balcony of any one of Claims 1 thru | or 4 which provided the function.   The Z-stripe (1) has a Z-bottom bar (1D) and a Z truss bar (1M). The balcony according to any one of claims 1 to 5, wherein the fixing portion (ZD) is integrated with the cast concrete in the concrete frame (CF).   The balcony according to any one of claims 1 to 6, wherein the Z-strip (1) is fire-resistant coated in the heat-insulating layer (2B) of the composite panel (20).   Z-stripe (1) is coated with fire-resistant paint (1A) on the middle part located in the composite panel (20), and with anti-rust paint (1B) on both sides located in the cast concrete. Item 8. The balcony according to any one of items 1 to 7.   A composite panel (2) in which a heat insulating layer (2B) is layered on the inner surface side of a molded cement plate (2A) in which inner grooves (G, G ′) are vertically arranged on the inner surface is formed into a molded cement plate (2A). As an outer wall outer formwork (F0), the outer wall formwork (FW) is configured together with the outer wall inner formwork (F1), and inside the composite panel (2) on the outer wall formwork (FW). Consists of a floor slab formwork (FA) in the living area and a balcony floor slab form (FB) outside the composite panel (2). And Z lower end bar (1D) are fixedly integrated with a Z truss bar (1M) composed of a horizontal upper side (1U '), an intermediate inclined part (1S) and a horizontal lower side (1D') (1) The cross panel joystick for air communication is mounted on the composite panel (2) of the outer wall formwork (FW). The Z-strip (1), which is placed and connected via the joint (9) and protrudes forward and backward from the composite panel (20), respectively, in the balcony floor slab formwork (FB) and the living part floor slab formwork (FA ) And cantilever support balcony construction method in which concrete is placed on each formwork (FW, FA, FB).   Z-stripe (1) is pre-coated with fire-resistant paint (1A) on the part located in the composite panel (20), and anti-rust paint (1B) on the part located in the cast concrete. (20) The construction method according to claim 9, wherein the insertion hole (H3) in the form of a long hole in the composite panel heat insulating layer (2B) is filled with a fireproof covering material (2E) rich in heat insulating properties.   In the balcony floor slab formwork (FB) and the living part floor slab formwork (FA), the Z-strip (1) is held by a spacer (12A, 12B), and the balcony floor slab formwork (FB). The construction method according to claim 9 or 10, wherein the Z upper end line (1U) is bound to the long side direction upper end line (11A) and the Z lower end line (1D) is bound to the long side direction lower end line (11B) with a wire.   The upper and lower connections between the composite panel (2) and the composite panel (20) are provided with horizontal abutment plates (9M) projecting on both sides, vertical fitting pieces (9F, 9F ') on the upper and lower sides, Inside the vertical piece (9F, 9F ′) for insertion, a cross joint (9) having an incision (CA) for air communication is connected to the groove (G) at the upper and lower ends of the molded cement plate (2A). The construction method according to any one of claims 9 to 11, wherein the rubber plate (15) is interposed between the plate-like portions (2C) of the upper and lower molded cement plates (2A).

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